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C. AfCHAN'DLYER. i Paper-Bag Machine. No. 228,312. Patented June I, 1880.

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C. A. CHANDLER.' Paper-Bag Mach-ine.

No. 228,312. Pa1e111ed1-une1,1880.

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ilNrrEn States Parent Ormea..

CLARENCE A. CHANDLER, OF EAST BRIDGEWATER, MASS., ASSIGNOR TO THE EASTERN PAPER BAG COMPANY, OF HARTFORD, CONN.

PAPER-BAG MACHINE.

SPECIFICATION forming' part of Letters Patent No. 228,312, dated June 1, 1880,

Application nieu Maren 26, '1880. (No model.)

To all 'whom tt may concern:

Beit known that I, CLARENCE A. CHAND- LER, of East Bridgewater, Plymouth county, State of Massachusetts, have invented an Improvement in Machinery for the Manufacture of Paper Bags, of which the following description, in connection with the accompanying' drawings, is a specification.

This invention in paper-bag machines re- Io lates especially to mechanism for forming the two cross or final folds needed to complete a Satchel-bottomed bag.

This machine will follow any usual machine having devices capable of forming at the end of a tube the well-known diamond fold-such, for instance, as described in United States Patents Nos.ll6,842 and 220,925, to which reference may bc had.

The diamond fold having' been made, the zo tubular piece of paper to be formed into a bag is acted upon by the rst cross-foldin g blade, which, striking it transversely to the length of the bag and across the leading corner of the diamond fold, forces the paper between the pair of feeding-rollers, which, as the paper passes between them, completes the said fold. The diamond fold having passed beyond the said feeding-rollers, a movable plate is interposed between the tube and the under side of 3o the rear end of the diamond fold, and as the leading end of the diamond fold, cross-folded as just described, passes beyond a roller-support, the second cross folder or blade descends upon the paper, bearing upon it at the rear 3 5 corner of the diamond fold, then partiallysupported by the movable plate, and is by the second folding-blade forced between the plate and roller-support, the second blade creasing and cross-folding the rear corner of the dia- 4o mond fold, completing the bag without making other creases in the tube except those which act to give shape to the bag-bottom.

Figure l represents, in vertical longitudinal section, a sufficient portion'of a paper-bag machine to illustrate my invention, the parts being in the position they will occupy just as the cross-fold at the leading end of the diamond fold is being started. Fig. 2 shows a like section, with the parts inthe position they will occupy when the second cross-fold is be- 5o ing started. Fig. 3 is a similar section, showing the once cross-folded tubular paper with the rest-plate carried back of the rear end of the diamond fold preparatory to being moved in between the said rear end and the body of the tube, so as to partially support the rear corner of the said diamond fold just before the second or final cross-fold is to be and is being made, the once cross-folded end of the diamond fold being shown as fed beyond the 6o roller-support. Figs. 4, 5, and 6 represent the paper tube as it will appear during the formation of the bag-bottom; and Fig. 7 is a detail to be referred to.

The paper tube A, suitably folded and having the diamond fold made therein, as shown in diagram Fig. 4, has the leading corner of the diamond fold extended across the space between the feeding-rollers l) E far -enough to permit the irst folding-blade, F, to strike the 7o leading end of the diamond fold on the line l and enter the paper between the said rollers, the parts being as in Fig. l. Just as the paper emerges from between the said feedingrollers, and before the paper passes beyond the shelf a, the rest-plate b, herein shown as connected with the vibrating arm c, pivoted at d, is raised into the position shown in Fig. 3, and the tube, with its leading cross-fold iinished, is moved sufficiently forward to pass 8o over or beyond the center of the supportingroller G until it arrives at substantially the position shown in the said figure. In this condition the rest-plate is quickly thrown downward or forward into the position shown in Fig. 2, it entering the space between the end of the tubular piece of paper and the rear corner, 2, of the diamond fold, when the second cross-folder, f, is immediately brought down upon the rear part, 2, ofthe diamond fold at the 9o proper distance from the usual central crease or fold, the said second folder-blade, j', creasing and inserting the body of the tube and the rear corner of the dia-mond fold in between the rest-plate b and the roller or moving surface G, the passage of the tube or paper so folded between the said surfaces I) an-d Gr completing` the final cross-fold and finishing the bag-bottom. The diamond fold, before Or during the time it is being so cross-folded, may be pasted in any usual way.

The front edge of the rest-plate b may be more or less thick Or rounded, so as to avoid making a transverse crease in the tube or bag between its Open end and the central fold, (designated by line l.)

I do not broadly claim a blade and pair Of rollers to form the iirs't cross-fold in a bagbot tom, nor do I broadly claim two blades and two sets Ot' rollers to operate in succession and form the iirst and second cross or final folds.

Fig. 5 represents the tube as it will appear after passing between the rollers D E, and Fig. 6 after being Operated upon by the second folder-blade, f.

I do not desire to limit my invention to the particular devices shown to operate the folderblades.

As herein shown, I have employed a shaft, H, upon which is a toothed gear, I, provided with a roller-stud, g, (shown in dotted lines,) that strikes one of the arms c, which carries the rest-plate, the said arms being held loosely upon the roller-shaft d. One of these arlns c has attached to it a segmental rack, J, that engages a pinion, h, and oscillates the supporting-roll Gr. A link, K, joins the rack J with the arm 7c of the rocker-shaft L, having arms l, which carry the second cross-folding blade, f., The arm c is kept up by the spring M when not thrown down by the roller g. In-

stead of this roller ou the toothed gear I and the said spring, I may employ a cam-disk having a groove of the proper shape to move the rest-plate b and blade f positively in both directions.

The rotating shaft H, driven in any way, has at the end of it a crank and link, h t. (See Fig. 7.) One end of this link i is connected with one of the arms N, which carry the rst folding-blade, F, they being secured to the rocker-shaft d. The feed-rollers are operated by the gear I, it engaging one of' the pair of toothed gearing m n on the said rollers.

I claiml. The first folding-blade and feeding-rollers and vibrating rest-plate, adapted to be interpressed between the rear corner of its diamond 5 the rollers, combined with the rest-plate, the

movable supl'iorting-surface, and the second cross or final folder', substantially as described. In testimony whereOfI have signed my name to this specification in the presence of two subscribing witnesses.

CLARENCE A. CHANDLER. Witnesses:

G. W. GREGORY, L. F. CONNOR. 

